| Abbreviation | Definition |
|---|---|
| ASSP | Associated Students of the School of Pharmacy |
| ASSP | Associated Students School of Pharmacy |
| ASSRT | Adullam School of Supernatural Reformation Transformation |
| ASSS | Alpine Sleep Summer School |
| ASTA | Australian School of The Arts |
| ASTC | After School Then College |
| ASTN | Aoraki School Transport Network |
| ASV | American School Valencia |
| ASV | Averted School Violence |
| ASWP | Arizona School-to-Work Partnership |
| ATAS | Acting To Achieve School |
| ATB | Ability To Benefit |
| ATDS | American Truck Driving School |
| ATDS | Arbuckle Truck Driving School |
| ATDS | Truck Driving School |
| ATHS | Addison Trail High School |
| ATHS | Alief Taylor High School |
| ATHS | Arts and Technology High School |
| ATLAS | A Taste Of Languges At School |
| ATMS | Archdale Trinity Middle School |